beatingeffekten
Beatingeffekten, oft kallad the beating effect, is the periodic variation in the amplitude of a signal that occurs when two waves with similar but not identical frequencies are superposed. The phenomenon is common in acoustics, music, and radio engineering, where the interference between two tones produces noticeable fluctuations in loudness at a rate equal to the absolute difference between the frequencies.
Mathematically, two sine waves of equal amplitude can be expressed as s(t) = sin(2π f1 t) + sin(2π
Perception and applications: Beats are most noticeable when Δf is small, typically from a few hertz up